CHDK is available in an early BETA version for the Powershot SD4500IS / IXUS1000HS / IXY50S firmware 1.00d, 1.00f & 1.02b See the links below for source and binary. Also available from the CHDK SVN server in source form.

Firmware info

Note: ver.req or vers.req method may not work on the SD4500, see P-ID (Table) for other methods to get the P-ID or use CameraVersion to get your firmware version from the EXIF image data.

CHDK Specialties

This section describes special CHDK-related things...

The video key press short switch the chdk alt mode. press long record video

chdk menu make card bootable does not work. Use a Program on your PC to make the Card bootable. Remember the 4 GB Limit of boot Partition. I suggest to use 2 4 gb Partitions so you need switch partitions only when 4gb is full when you want read data.

Switch partitions chdk menu work. After that switch off and on the Camera

Keys now perfect work.Video key is use to switch to alt mode.longer press of video key start video record

Raw with DNG work ok now.This Camera use a diffrent Sensor Pattern

green red

blue green

as all other Canons, so there is no CRW konverter currently here.

RAW DNG savetime is 1.4 - 1.5 sec(series shoot and use new chdk doublebuffer feature) with a sandisk ultra 8 GB 15 Mb/sec(write bench show 12 megabyte, but its only a class 4 Card.).with CRW savetime is 1.2 -1.3 sec, so not very important to have CRW here.

Auto chdk Boot of Camera does work(test on a 4 GB Card only)

scripts do work(also intervalscripts that do shoot), text output of scripts is now too show.problem was

when you set the 16:9 (wide) shooting mode, Overexpose/underexpose Dot work in Historgramm and Edge Overlay work too.seem chdk do not handle diffrent shooting modes as 4:3 shoot mode on a 16:9 display and 16:9 shoot mode on 16:9 display

alt key Mode work not very good due to problem in alt or normal key mode.when you leave chdk alt mode, you need press this keys(left, right, down, up, menu, set) (you need not press all together) so the firmware can recognize keys again.

in alt mode, do not work to hide keypress from the firmware rom correct.so better avoid to use the alt mode if possible.

The port do no random crash so can use.

whats not working but important.

print show no text in scripts, so can not see if a script correct work or not.

RAW in crw cant open by any program

RAW in dng can not save because badpixel.lua not work correct

raw image with badpixel.bin from SX210 show wrong colors.

Grid overlay is wrong center in 4:3 shoot mode and in 16:9 shoot mode its too small in X